Human societies facing two problems. One, is the increasing of greenhouse gas contributing to the global warming. And the second is oil depletion, especially in European continent.

In this context, decarbonization of mobility is on the road and internal combustion engines are replaced by electric vehicles (EVs). But in many aspects, such vehicles are overengineering for the daily used, leading to resource and space overconsumption.
An emerging solution to avoid this problem is the micromobility. But no clear definition has been set today. Bigo et al. propose to define these vehicles as weights inferior to 600 kg, which range from bicycles to microcars[1].

To have a sufficient range, they are mainly electrified and equipped with small battery packs. The design of the battery is highly cost-effective, featuring a simple mechanical structure and a basic battery management system (BMS). Moreover, they do not include any battery thermal management system (BTMS) as we find in EV’s actual design. Their casings are typically not optimized to dissipate heat generated by thermal losses. In European union, some of these packs are designed according to the Light Mean of Transportation (LMT) standards (< 25 kg, sealing and for mobility). Another major difference between EV’s and micromobility is the discharge C-rate. Indeed, EVs are designed for long trips and the capacity of the battery pack is significant compared to the discharge current. This particularity results in less thermal loss due to the Joule effect, leading to lower temperatures. In the lithium-ion research field, the impact of the temperature and the power profile on the lifespan is well-known. The proposed work focused on the thermal aspect of e-bike battery packs. First, power profile was developed according to the paper of Watling et al. to used WMTC standard for e-bike vehicles[2]. Secondly, experiments were carried out on an e-bike battery to understand the phenomena inside the pack (heat sources, thermal exchange). Thirdly, a model has been developed to simulate the thermal behavior of the pack during all the phases (charge, discharge, rest). At the end a lifespan study was conducted to have an idea about the possible range of these batteries. The major insights of these work are: – Impact of heat generation of the BMS on the cells – Low thermal exchange between the cells and the external environment – First idea of the theorical lifespan of these small batteries – Impact of the C-rate on the lifetime [1] A. Bigo et al., « Définition et typologie des véhicules intermédiaires »:, Transports urbains, vol. N° 141, no 1, p. 4‑8, sept. 2022, doi: 10.3917/turb.141.0004. [2] D. Watling, P. Baptista, G. Duarte, J. Gao, et H. Chen, « Systematic Method for Developing Reference Driving Cycles Appropriate to Electric L-Category Vehicles », Energies, vol. 15, no 9, p. 3466, mai 2022, doi: 10.3390/en15093466.